RFC 1480 (rfc1480) - Page 1 of 47


The US Domain



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Network Working Group                                          A. Cooper
Request for Comments: 1480                                     J. Postel
Obsoletes: 1386                                                June 1993

                             The US Domain


Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard.  Distribution of this memo is
   unlimited.

Table of Contents

   1.  Introduction ................................................  2
       1.1  The Internet Domain Name System.........................  2
       1.2  Top-Level Domains.......................................  3
       1.3  The US Domain ..........................................  4
   2.  Naming Structure ............................................  4
       2.1  State Codes ............................................  8
       2.2  Locality Names..........................................  8
       2.3  Schools ................................................ 10
       2.4  State Agencies.......................................... 15
       2.5  Federal Agencies ....................................... 15
       2.6  Distributed National Institutes......................... 15
       2.7  General Independent Entities............................ 16
       2.8  Examples of Names....................................... 17
   3.  Registration ................................................ 20
       3.1  Requirements ........................................... 20
       3.2  Direct Entries ......................................... 21
       3.2.1   IP-Hosts............................................. 21
       3.2.2   Non-IP Hosts ........................................ 21
       3.3  Delegated Subdomains ................................... 24
       3.3.1   Delegation Requirement............................... 26
       3.3.2   Delegation Procedures ............................... 28
       3.3.3   Subdomain Contacts................................... 29
   4.  Database Information......................................... 30
       4.1  Name Servers ........................................... 30
       4.2  Zone files ............................................. 30
       4.3  Resource Records ....................................... 31
       4.3.1   "A" Records ......................................... 32
       4.3.2   CNAME Records ....................................... 32
       4.3.3   MX Records .......................................... 33
       4.3.4   HINFO Records ....................................... 33
       4.3.5   PTR Records ......................................... 33
       4.4  Wildcards .............................................. 34
   5.  References .................................................. 35



Cooper & Postel


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